KROHNE H250 M40 Supplementary Instructions Manual
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H250 M40
H250 M40
H250 M40
H250 M40
Equipment category II 2 G / II 2D , EPL Gb / Db
in equipment protection by flameproof enclosures Ex-d and
in equipment dust ignition protection by enclosure Ex-t
© KROHNE 04/2016 - 4002069603 - AD H250-M40-ExII2GD-R03 en
Supplementary Instructions
Supplementary Instructions
Supplementary Instructions
Supplementary Instructions
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Table of Contents
Related Manuals for KROHNE H250 M40
Summary of Contents for KROHNE H250 M40
- Page 1 Supplementary Instructions Equipment category II 2 G / II 2D , EPL Gb / Db in equipment protection by flameproof enclosures Ex-d and in equipment dust ignition protection by enclosure Ex-t © KROHNE 04/2016 - 4002069603 - AD H250-M40-ExII2GD-R03 en...
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Page 2: Table Of Contents
CONTENTS H250 M40 1 Safety instructions 1.1 General notes ........................3 1.2 EU conformity ........................3 1.3 Approval according to the IECEx scheme ................ 3 1.4 Safety instructions......................3 2 Device description 2.1 Description of device ......................4 2.2 Description code....................... 4 2.3 Marking.......................... -
Page 3: Safety Instructions
SAFETY INSTRUCTIONS H250 M40 1.1 General notes These additional instructions apply to explosion-protected versions of variable area flowmeters with electrical built-ins and the marking II 2 G or II 2 D. They complete the standard manual for the non-explosion protected versions. -
Page 4: Device Description
DEVICE DESCRIPTION H250 M40 2.1 Description of device Variable area flowmeters measure and display the volume flow of flammable and non- flammable gases and liquids. Depending on the device version, electrical limit switch contacts ® with counter module, reed contacts, a 4...20 mA signal output with HART communication, a Foundation Fieldbus interface or a Profibus PA interface can be installed in the indication unit. -
Page 5: Marking
DEVICE DESCRIPTION H250 M40 2.3 Marking The marking of the entire device is on the indication unit, where the following identification plate can be found (see also designation code). Figure 2-1: Example of a nameplate 1 Device type 2 Manufacturer 3 Identification number of the notified body ATEX &... -
Page 6: Flammable Products
DEVICE DESCRIPTION H250 M40 2.4 Flammable products Atmospheric conditions: Atmospheric conditions: Atmospheric conditions: Atmospheric conditions: The ATEX directive does not stipulate values for atmospheric conditions. However, for determining the explosion characteristic parameters of temperature and pressure range, the following is assumed as a basis: = -20...+60°C / -4...+140°F and P... -
Page 7: Protection Types
DEVICE DESCRIPTION H250 M40 2.6 Protection types The variable area flowmeter is designed for equipment protection "flameproof enclosure", protection level "Gb" acc. to EN 60079-1 and "Equipment - dust ignition protection through enclosure", protection level "Db" acc. to EN 60079-31. -
Page 8: Ambient Temperature / Temperature Classes
DEVICE DESCRIPTION H250 M40 2.7 Ambient temperature / temperature classes Due to the influence of the product temperature, variable area flowmeters with built-in electrical equipment (electric variants) are not assigned to any fixed temperature class. In fact, the temperature class of a device is a function of the temperature of both the product and the environment. - Page 9 DEVICE DESCRIPTION H250 M40 Maximum permissible temperatures when using a heat resistant connecting cable Maximum permissible product temperature T [°C] Heating jacket T2, T1 ≤ 60 ≤ 65 ≤ 65 ≤ 60 ≤ 65 ≤ 60 ≤ 65 without with version [°C]...
- Page 10 DEVICE DESCRIPTION H250 M40 Reference point observation Reference point observation Reference point observation Reference point observation The permissible product and ambient temperatures may be exceeded or undershot as long as the permissible temperature range of the reference point of the display is not exceeded. The following table contains the permissible maximum values at the reference point.
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Page 11: Surface Temperature For Equipment Category Ii 2 D
DEVICE DESCRIPTION H250 M40 2.8 Surface temperature for equipment category II 2 D For use in areas with flammable dust it should be noted that the indicated maximum surface temperature of T70°C at an ambient temperature of 65°C / 149°F and a product temperature of 65°C / 149°F is valid without a dust coating. -
Page 12: Installation
INSTALLATION H250 M40 3.1 Installation Installation and setup must be carried out according to the applicable installation standards (e.g. EN 60079-14) by qualified personnel trained in explosion protection. The information given in the standard manual and the supplementary instructions must always be observed. -
Page 13: Special Conditions
INSTALLATION H250 M40 3.2 Special conditions Equipotential bonding Variable area flowmeters must be included in the equipotential bonding of the hazardous area. Electronics compartment lock Lock the dustproof and/or flameproof electronics compartment of the variable area flowmeter during operation. First tighten the cover by hand. Then tighten the cover again by about 90°. The cover for the electronics compartment is secured by means of a lock. -
Page 14: Electrical Connections
ELECTRICAL CONNECTIONS H250 M40 4.1 General notes Rated values for insulation • The insulation of the H.../../M40 - Ex variable area flowmeter is rated in compliance with IEC 60664-1. The following rating parameters are taken into account: • Overvoltage category for signal and instrument loops: II •... -
Page 15: Power Supply
ELECTRICAL CONNECTIONS H250 M40 4.2 Power supply The variable area flowmeter does not require a separate power supply. The required supply for the built-in electronics is provided via the 4...20 mA current output and the bus connection. 4.3 Inputs/outputs The terminal assignment of the built-in electrical equipment is described in the standard manual. -
Page 16: Grounding And Equipotential Bonding
ELECTRICAL CONNECTIONS H250 M40 4.4 Grounding and equipotential bonding The signal converter shall be connected to the equipotential bonding system of the hazardous area via the internal or external grounding connection on the signal converter housing. The measuring unit and the signal converter are electrically connected via an equipotential bonding connection. -
Page 17: Operation
OPERATION H250 M40 5.1 Start-up Start-up is only permitted when the variable area flowmeter: • is correctly installed in the system and connected. • has been checked for the proper state with regard to its installation and connection requirements. • and the electronics compartment have been properly closed (pressure-resistant casing or dustproof housing) and the applicable special lock has been fitted. -
Page 18: Service
SERVICE H250 M40 6.1 Maintenance Maintenance work of a safety-relevant nature within the meaning of explosion protection may only be carried out by the manufacturer, his authorised representative or under the supervision of authorised inspectors. To maintain proper condition, regular inspections are required for systems in hazardous areas. - Page 19 SERVICE H250 M40 Replacing the indicator / modules When exchanging a complete indicator or individual modules, refer to the section "Connecting power and I/O functions". In both cases, the measuring tube of the variable area flowmeter can remain in the pipeline. This also applies to line systems carrying product.
- Page 20 • Process Analysis • Services Head Office KROHNE Messtechnik GmbH Ludwig-Krohne-Str. 5 47058 Duisburg (Germany) Tel.: +49 203 301 0 Fax: +49 203 301 10389 info@krohne.com The current list of all KROHNE contacts and addresses can be found at: www.krohne.com...
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